Cita APA (7th ed.)

Kelsey, J. L. W. (1996). Methods in observational epidemiology (2nd.). Oxford University Press.

Cita Chicago (17th ed.)

Kelsey, Jennifer L. Whittemore. Methods in Observational Epidemiology. 2nd. New York: Oxford University Press, 1996.

Cita MLA (8th ed.)

Kelsey, Jennifer L. Whittemore. Methods in Observational Epidemiology. 2nd. Oxford University Press, 1996.